The trigger-release door retainer is a heavy-duty retainer for domestic doors and window shutters. Releasing the door is easy with the trigger release mechanism, which can also engage the door with a simple and effortless push.Lever-release door retainer. Screw hole to screw hole measurement: 70mm. Measurements can vary slightly – Hole to hole – Trigger side – 67mm Catch side – 70mm Overall dimensions when dipped together – 68mm